OM SYSTEM OM-5 Mirrorless Camera with 12-45mm f/4 PRO Lens (Silver) - Manual (Page 94)

To enable cluster AF targeting when q (all targets) is
selected and either [C-AF] is chosen for [ n AF Mode] or
[S-AF], [S-AF J ], [C-AF], or [C-AF J ] is chosen for [ K AF
Mode] (P. 118) , select [On2] for C Custom Menu b > [AF Area
Pointer] (P. 271) . The camera will display AF targets for all areas
that are in focus.
94
Choosing an AF Target Mode (AF Target Mode)
B